Java byte[]转List

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>30.1.1-jre</version>
        </dependency>

package ai.guiji.csdn.tools;

import com.google.common.primitives.Bytes;

import java.util.Arrays;
import java.util.List;

/** @Author 剑客阿良_ALiang @Date 2022/1/26 14:51 @Description: byte工具 */
public class ByteUtils {
  /**
   * 字节组转list
   *
   * @param bytes 字节组
   * @return List
   */
  public static List<Byte> bytesToList(byte[] bytes) {
    return Bytes.asList(bytes);
  }

  /**
   * list转字节组
   *
   * @param list list
   * @return byte[]
   */
  public static byte[] listToBytes(List<Byte> list) {
    return Bytes.toArray(list);
  }

  /**
   * 截取bytes
   *
   * @param bytes 字节组
   * @param from 起始位
   * @param to 结束位
   * @return bytes
   */
  public static byte[] subBytes(byte[] bytes, int from, int to) {
    return Arrays.copyOfRange(bytes, from, to);
  }
}

//将map转换成byte[]
    protected byte[] changeMapToByte(Map<String,String> map) {
        
        byte[] bytes = null;
        try {
            bytes = JsonSerilizable.serilizableForMap(map).getBytes();
        } catch (Exception e) {
            baselog.error("map到byte[]转换异常",e);
        }
        
        return bytes;
    }
    
    //将byte[]转换成map
    protected Map<String, String> changeByteToMap(byte[] bytes) {
        
        Map<String, String> retmap = null;
 
        try {
            if(bytes != null) {
                retmap = JsonSerilizable.deserilizableForMapFromFile(new String(bytes), String.class);
            }else {
                baselog.error("changeByteToMap中bytes为null");
            }
            
        } catch (Exception e) {
            baselog.error("byte到map转换异常",e);
        }
        
        return retmap;
    }

package com.jd.goldeneye.stat.common;
 
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
import com.jd.fastjson.JSON;
import com.jd.fastjson.TypeReference;
 
public class JsonSerilizable {
 
    /* 将链表序列化为字符串存入json文件中 */
    public static String serilizableForList(Object objList)
            throws IOException {
 
        String listString = JSON.toJSONString(objList, true);// (maps,CityEntity.class);
        
        return listString;
    }
 
    /* 将json文件中的内容读取出来，反序列化为链表 */
    public static <T> List<T> deserilizableForListFromFile(String listString2,Class<T> clazz)
            throws IOException {
 
        List<T> list2 = JSON.parseArray(listString2, clazz);
        return list2;
    }
 
    /* 将HashMap序列化为字符串存入json文件中 */
    public static String serilizableForMap(Object objMap)
            throws IOException {
 
        String listString = JSON.toJSONString(objMap, true);// (maps,CityEntity.class);
        return listString;
    }
 
    /* 将json文件中的内容读取出来，反序列化为HashMap */
    public static <T, K> HashMap<K, T> deserilizableForMapFromFile(String listString2,Class<T> clazz) throws IOException {
        
        Map<K, T> map = JSON.parseObject(listString2, new TypeReference<Map<K, T>>() {});
        
        return (HashMap<K, T>) map;
    }
    
    
    
    
    //使用方法 注意Entity为随机定义，使用时用自己的类名替换下就可以用了
    /*String pathName = "src/test/java/com/...../resources/file.json";
    List<Entity> entityList = new ArrayList<Entity>();
    JsonSerilizable.serilizableForList(entityList, pathName);
    List<Entity> entityList2 = JsonSerilizable
            .deserilizableForListFromFile(pathName, Entity.class);
    
    
    HashMap<Integer, Entity> Map = new HashMap<Integer, Entity>();
    JsonSerilizable.serilizableForMap(Map, pathName);
    HashMap<Integer, Entity> Map2 = JsonSerilizable
            .deserilizableForMapFromFile(pathName, Entity.class);*/
 
}

//将map转换成byte[]
    protected byte[] changeMapToByte(Map<String,String> map) {
        
        byte[] bytes = null;
        try {
            bytes = JsonSerilizable.serilizableForMap(map).getBytes();
        } catch (Exception e) {
            baselog.error("map到byte[]转换异常",e);
        }
        
        return bytes;
    }
    
    //将byte[]转换成map
    protected Map<String, String> changeByteToMap(byte[] bytes) {
        
        Map<String, String> retmap = null;
 
        try {
            if(bytes != null) {
                retmap = JsonSerilizable.deserilizableForMapFromFile(new String(bytes), String.class);
            }else {
                baselog.error("changeByteToMap中bytes为null");
            }
            
        } catch (Exception e) {
            baselog.error("byte到map转换异常",e);
        }
        
        return retmap;
    }